Pipe-wrench.



PATENTED AUG. 22, 1905.

W. H. BROGK.

PIPE WRENCH.

APPLICATION FILED 5EPT.15,1904.

WI TNE ATTORNHS FFICE.

XVILLIAM H. BROOK, OF SEAFORD, NEW YORK.

WIPE-WRIENEl-l.

Specification of Letters Patent.

Patented Aug. 22, 1905.

Application filed September 15, 1904. Serial No. 224,536.

To all 11/72/0711, it warty concern:

Be it known that I, YVILLIAM H. BROOK, a citizen of the United States, and a resident of Seaford, in the county of Nassau and State of New York, have invented a new and Improved Pipe-Wrench, of which the following is a full, clear, and exact description.

My invention relates to pipe-wrenches, my more particular object being to produce a socalled chain pipe-wrench, presenting certain constructional advantages hereinafter described, and pointed out in the appended claims.

Reference is to be had to the accompanying drawings, forming apart of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan View of a wrench made according to my invention. Fig. 2 is a ver tical section through the same upon the line 2 2 of Fig. 1 looking in the direction of the arrow. Fig. 3 is a fragmentary vertical section upon the line 3 3 of Fig. 2 looking in the direction of the arrow, and Fig. at is a perspective View of one of the plates removed.

The handle of the Wrench is shown at4:and the headat 5, the head being provided with serrations 6 and with a pivot-point 7, to which is connected a chain 8, provided with bosses 9, the serrations and chain being of the usual construction. The head 5 is widened at the points 5 5 as indicated in Fig. 1.

Detachably mounted upon each side of the handle 4: and partly sunken into the head 5 are plates 10, each provided with lugs 12 13 integral therewith. The plates are connected together by a stout screw 11, which passes directly through the handle and is provided with a nut 14, whereby the plates are rigidly clamped in position. The plates may be riveted or secured in any desired manner.

It will be noted that the plates 10 are sunken partially into the handle 1 and head 5, as indicated by dotted lines in Fig. 2, the handle and head being provided with channels 15 for this purpose. These channels extend angularly across the handle t, and the wide places 5 5" virtually constitute shoulders for bracing the plates 10, as will be understood from Fig. 1. The pipe to be turned is shown at 16.

The Wrench is used in the manner well known in the artto wit, the chain is brought around the pipe 16 and lodged upon the lugs 13 or 12, so that the operation of the handle t will cause a partial rotation of the pipe.

My improvement relates to the manner of mounting the lugs 12 13. Heretofore these lugs have been made integral with the handle 4 and head By cutting the channels 15 in the handle and head and placingthe plates 10 in position, the lugs 1213 being integral with the plates, 1 am enabled to replace the plates when broken or worn out and am also enabled to greatly chcapen the construction of the wrench. Another and very important advantage is that the plates 10 may be made of line and hard nietal, whereas the handle 1 maybe constructed of comparatively cheap material.

The pivot-point 7 is merely a central Web integral with the head 6, but thinner than the same and so arranged that the first link of the chain, being bifurcated, is placed astride of the web. This arrangement enables the pivotpoint '7 to be formed by dro 'i-forging, whereas if the end of the wrench were slotted, so as to engage a single plier-link of the chain, it would be necessary to make the slot by means of a milling-cutter. The channels 15 are also made by drop-forging and require but little pressing afterward in order to accommodate the twin plates 10. It will be understood that by thus forming these channels by drop-forging the surface of the channel is made of comparatively hard metal--to wit, the so-called skin of the metal-whereas if the channels were made by milling or by filling the metal left and constituting the bottom and sides of the channel would be comparatively soft.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1. A pipe-wrench, consisting of a serrated head provided with an integral handle and having its front end recessed on opposite sides to form a web, the head and handle being provided on diametrically opposite sides, at their junction with each other, with oblique channels, and with a transverse aperture in said channels, oblong plates in the channels and having their ends projecting beyond the sides of the handle and terminating in forwardlyprojectinglugs, each plate being provided with an aperture at its center of length, a bolt or rivet passing through the apertures of the plates and handle and securing said plates in the channels, and a chain provided with laterally-projecting bosses and having at one end a bifurcated link, the members of which extend on opposite sides of the web of the head and are pivoted thereto, substantially as herein shown and described.

2. In a wrench of the character described,

a head having an integral handle and enlarged at its junction with the handle, the head and handle being provided on diametrically opposite sides with oblique channels and with a transverse aperture in said channels, the forward walls of the said channels being at about the center of the enlarged portion of the head, oblong plates in the channels and having their ends projecting beyond the sides of the handle and terminating in forwardly-projecting lugs, each plate being provided at the center of its length with an aperture, a bolt detachably securing the plates in the channels, and a chain pivoted to the head and provided with bosses,

substantially as herein shown and described. 3. In a Wrench of the character described, a head having an integral handle, the head and WVILLIAM H. BROCK.

l/Vitnesses:

WVALToN HARRISON, EVERARD BOLTON lVIARSHALL. 

